Step for to create an keystore

1 As you can use the command keytool for to make an keystore file

$JAVA_HOME/bin/keytool -genkey -alias namealias -keyalg RSA -keystore namefile.keystore -validity 730

2 For to make  an  CSR:

$JAVA_HOME/bin/keytool -certreq -v -alias namelais -file namefile.csr -keypass 'J1bos$1' -keystore namefile.keystore

You have to send  the CSR file to Your Certification Authority

3 For check file  keystore

$JAVA_HOME/bin/keytool -list -keystore namefile.keystore -v

The second step is not mandatory for to configure the conncector https

In your standalone.xml file add this tag

<connector name="https" protocol="HTTP/1.1" scheme="https" socket-binding="https" secure="true">

                <ssl name="https" key-alias="namealis"  password="yourpassword" certificate-key-file="../standalone/conf_keystore/namefile.keystore"/>

            </connector>

EASY?